Why is the 1280×720 size missing for this video?

Because it doesn't exist. Videos uploaded in low resolution, and plenty of older ones, never got an HD thumbnail. YouTube answers those requests with a tiny grey placeholder; we check the actual file and only list sizes that are real.

Yes. A Short carries the same set of thumbnails as a normal video — paste its link exactly the same way.

Can I get the channel's banner too?

Yes. Paste the channel's link (not a video) and you'll get the profile picture in sizes up to 1600×1600 and the banner in widths up to 2560 px, both pulled from the channel's own public page.

Whose picture is a thumbnail?

The channel's. If you're quoting or reviewing the video, that's one thing; re-uploading its thumbnail as your own is asking for a copyright complaint.

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YouTube thumbnail downloader

Paste a video link and download its thumbnail in every size YouTube generated — up to 1280×720. Or paste a channel link and get its profile picture (up to 1600×1600) and banner. Useful for quoting a video in a post, studying how a cover is built, or grabbing a still when the video itself won't sit still.

File	Size

The sizes YouTube actually makes

Size	Where it comes from
1280×720	The HD thumbnail (maxresdefault). The prize — when it exists.
640×480	SD version (sddefault). Present on most videos.
480×360	HQ (hqdefault). Always generated.
320×180	MQ (mqdefault). Good for small embeds.
120×90	The tiny default. Mostly useful as a placeholder.

Every video gets the small ones. The big one — the one worth downloading — only exists when the channel worked in HD. We test each file before listing it, so a size on this page is a size that exists.

How to copy the link

In the YouTube app: Share → Copy link.
On a computer: copy the address bar while the video is open.
Short links (youtu.be) and Shorts links work as pasted.

And the channel's profile picture?

Yes — here. Paste the channel's link (youtube.com/@name, /channel/… or /c/…) and the box reads the channel's own public page and pulls out the profile picture in sizes up to 1600×1600, plus the banner in widths up to 2560 px. No API key and no account: it's the same picture the channel page shows everyone, at full size.

Video links and channel links both work in the same box — the box tells them apart on its own.

Straight answers

Why is the 1280×720 size missing for this video?: Because it doesn't exist. Videos uploaded in low resolution, and plenty of older ones, never got an HD thumbnail. YouTube answers those requests with a tiny grey placeholder; we check the actual file and only list sizes that are real.
Do Shorts work?: Yes. A Short carries the same set of thumbnails as a normal video — paste its link exactly the same way.
Can I get the channel's banner too?: Yes. Paste the channel's link (not a video) and you'll get the profile picture in sizes up to 1600×1600 and the banner in widths up to 2560 px, both pulled from the channel's own public page.
Whose picture is a thumbnail?: The channel's. If you're quoting or reviewing the video, that's one thing; re-uploading its thumbnail as your own is asking for a copyright complaint.